The purpose of this study was to assess differences in stroke rate between endurance and sprint swimmers. Ss were male endurance swimmers (N = 18) and sprint swimmers (N = 18). Ss performed a standardized incremental spiroergometry test in a swim flume (initial velocity: 0.90 m/s; followed by an increase of 0.05 m/s every three minutes with one minute recovery after each exercise increment). Arm stroke rate was determined during the last 30 seconds of each exercise increment.